The Crows went through a similar situation last year before defender Jake Lever requested a trade to Melbourne at the end of the season.

Sloane headlines a group of players including All Australian defender Rory Laird, forward Tom Lynch and injured half-back flanker Brodie Smith who are out of contract at the end of the year.

Pyke wasn't concerned if those players were unsigned by the start of the season.

"Ideally (they've signed), but each negotiation is unique in itself and the dynamic of how the players negotiate contracts, that's something we continue to work on as a club as how do we go about our re-contracting," Pyke said.

"The uniqueness of every situation means those things can take two weeks, they can take longer.